That depends on weither the ears actually work and if his brain can dechiper the information. If they work he might be an evolutionary leap, all be it a weird looking one. Which in an off it's self might get him more chances to breed (and pass on his mutation) with people wanting their own bat cat.

If they don't work, well they don't seem to be much of a draw back. Ignoring the human factor, they might be a begin mutation, hence getting passed on it no big deal.

Appearance alone might get this guy his chance to mark the kitty genome. If those things work and his decendants go feral (like lots of house cats do) he might earn his place in cat evolution.

After all evolution is random. A good mutation is a good mutation. Pass it on and hope. Bad ones get you or your kids dead, unless humans like you.